Resumen

ALCUDIA-AGUILAR, Alejandro et al. Salinity, botanical composition and growth of fruit species in home gardens in Tabasco, Mexico. Ecosistemas y recur. agropecuarios [online]. 2017, vol.4, n.10, pp.1-12. ISSN 2007-901X.  https://doi.org/10.19136/era.a4n10.691.

The aim of this work was to determine if soil salinity in uences the species composition of trees and shrubs in home gardens on the coast of the state of Tabasco, Mexico, and if the tolerance to salinity varies among the three most common species in the area. We determined the frequency and abundance of the tree and shrub species in 19 home gardens, as well as the electrical conductivity (EC) of the soil. In a nursery we subjected plants of the three most common species, namely soursop (Annona muricata L.), mango (Mangifera indica L.) and bitter orange (Citrus aurantium L.), to EC 124, 1 084, 2 143, 4 031 and 7 631 μS cm-1 in irrigation water, and afterwards plant height and root, stem and leaf biomass were determined. We calculated the EC that reduces biomass by 50% (EC50), and the stress tolerance index (ST-Index). The species composition in the eld changed with soil salinity. The EC50 in soursop, mango and sour orange was 9 580, 10 220 and 17 430 μS cm-1, and the ST-Index was 16 810, 9 300 and 8 830 μS cm-1. Salinity in uences species composition, and the most common species showed di erent tolerance to stress, so the species composition in home gardens will change as soil salinity increases through the impact of climate change in the region.

Palabras llave : Stress tolerance index; soursop; mango; orange.

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